Kendall Jenner and Cara Delevingne use their tongues in the weirdest way (PHOTO)

Christina is a reporter based in Boise, Idaho. She's a veteran vegetarian, a political junkie and a huge grammar snob. On the weekends, she can usually be found binging on Netflix, playing the piano or petting her cats, Daisy and Dandelion.

BFFs Kendall Jenner and Cara Delevingne prove just how close they are with their tongues

The two supermodels have been best buds for some time now, but by the looks of a new Instagram photo shared by Cara, they've taken their relationship to a whole new level.

"#Cake" is all she captions the photo of the two, both topless — or maybe naked? The two can only be seen wearing accessories — a gold chain for Cara and Beats headphones for Kendall. And Kendall is licking Cara's forehead while Cara is licking Kendall's shoulder. Yeah, it's as weird as it sounds.

The photo, which racked up more than half a million likes by Wednesday evening, definitely has fans wondering what's up, with comments ranging from "this is so weird actually" to "Drama? Talk show?"

Regardless, it got people talking, and a lot of them were talking about how adorable and silly these two besties can be.

Kendall and Cara have a well-documented friendship. They've walked in shows together at New York Fashion Week. During the Love magazine Advent Calendar project, they filmed an adorable clip that showed them playing together in a garden. And the cover for their Love magazine special edition has already been released, showing Kendall in Cara's arms. The two ham it up for the cameras whenever they're seen out together and are obviously close.

What do you think of Kendall Jenner and Cara Delevingne's adorably weird Instagram pic? What's the weirdest thing you do with your best friend? Head down to the comments and share your thoughts and your stories.